Final answer:
The EPA and AOAC are responsible for approving the efficacy of products used for infection control and registering all disinfectants.
Step-by-step explanation:
The responsibility for approving the efficacy of products used for infection control and registering all disinfectants lies with several organizations. The Environmental Protection Agency (EPA) is responsible for approving disinfectants used in the United States. The EPA designates disinfectant manufacturers to perform use-dilution tests to validate the efficacy claims for their products. Additionally, the Association of Official Agricultural Chemists International (AOAC) is a nonprofit organization that establishes standards for disinfectant testing.